Turtles In Time Original Arcade Game
 

Did the voice actors from the OT show do the voices for the characters in the original Turtles in Time arcade game?

don't think so

Yes, look here:

http://www.imdb.com/title/tt0278087/

Which I find quite odd since nobody really sounded like how they should...

Well, except maybe Baxter but that was it.

Nope, noone was from the OT. And the same guy voiced all 4 turtles. I mean the closest they did was the Shredder's voice for the first Arcade Game, cause whoever was imitating Uncle Phil came pretty close.

Yeah, none of the voices in the "Turtles In Time" arcade game sounded like the OT voices. It's odd that IMDb has the OT voices in the arcade game considering they're actually pretty accurate when it comes to their material, unless somebody writing that entry just got lazy or something.

I read somewhere that Barry Gordon & Pat Fraley did voices for one of the Arcade games, might have been Turtles In Time.

I can guarantee Krang isn't voiced by Fraley in Turtles in Time.

Back in the late '80s/early '90s before the influx of high-quality sound, most voices provided in video games were mostly in-house since the voice quality was a bit blurred so it didn't require the proper pitch/tone/rhythm/articulation to have a proper sound. From all of the Spaxx interviews from the Game Toon Zone, none of the OT VA's claimed to have voiced anybody from the two arcade games. It also didn't require much dialogue due to system limitations so it was a quick process that could be done by an ameteur, and I'd love to know more about video game voicing in the late '80s/early '90s.